Complete Guide to API 2350, 5th Ed

Purpose
The target audience for this guide are owners and operators of fuel distribution terminals, refineries, chemical plants, and any other facilities which receive petroleum or chemical products into storage.

Anyone responsible for safe operations at fuel marketing, distribution terminals, refineries, oil handling, or pipeline companies should take advantage of the state of art in tank overfill prevention that will be discussed in this guide. While the scope of API 2350 applies to the filling of petroleum-based
products associated with marketing, refining, pipeline and terminal facilities, its principles may be applied to any tank operation where there is a risk of overfilling the tank.

Most applications under API 2350 involve atmospheric or slightly pressurized tanks, but the principles of API 2350 can be used for higher pressure storage as well. The scope of API 2350 applies to overfill protection for NFPA2 Class 1 and Class 2 liquids and is also recommended for compliance
regarding Class 3 liquids. The “Scope of API 2350” (see below) presents a more detailed breakdown.

For flammable liquids classified by fire codes (Class 1 liquids) API 2350 can mitigate the likelihood of spilling these hazardous products and the likely resulting facility fire. Since spills of non-volatile organic liquids such as lube oils or heavy asphaltic products are often considered an environmental
hazard, overfills of these products are also addressed by the API 2350 standard.

Scope of API 2350
API 2350 applies to petroleum storage tanks associated with marketing, refining, pipeline, terminals and similar facilities containing Class I or Class II petroleum liquids.
API 2350 recommends including Class III liquids.